Pulp-washing machine.



J. SCHNEIBLE. PULP WASHING MACHINE. APPLICATION FILED JUNE 5, 1913.

1,1 1 1,408, Patented Sept. 22, 1914.

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J. SGHNEIBLE. PULP WASHING MACHINE. APPLICATION FILED JUNE 5, 1913.

Patented Sept. 22, 1914.

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similarly shaped PATENT onnicn JOSEPH SCHNEIBLE, OF "CHICAGO, ILLINOIS.

Specification. of Letters Patent.

PULP-WASHIN G MACHINE.

' Patented Sept. 22', 1914.

Application'flled ifune 5, 1913. Serial No. 771,905.

To all whom it may concern:

Be it known that I, JosnPH SCHNEIBLE, a-

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Pulp-Washing Machines, of which the following is a specification.

My invention relates to an improvement in the .class of machines used for washing fibrous material, such as filter-pulp t0 renovate-it after being employed as the filtering mass in a filter, and'thereby adapt it for-use In the accompanying drawings, Figure 1 shows my improved machine, with parts broken away, by a view in vertical sectional elevation; Fig. 2 is a section on line 2, Fig. 1; F ig. 3 is an enlarged section on line3, Fig. 1, and Fig. 4; is a view of a broken por- .tion of the machine viewed in the direction of the arrow on line 4, Fig. 1, and showing one of the two upper sets of guide-vanes.

A tank 5,.shown to be supported on pillars 6, has a hopper-shaped, numerously-per fora-ted, bottom'7 and, spaced from it, a

closed about its outer edge at 9. At the apex, or lowest point, of the hopper-shaped bottoms, they are open for discharge at that.

point. A vertical shaft 10 journaled at its lower end in a bearing at 11 and carrying" a beveled gear 12, passes through a stuffingbox 13 into 'the center of the tank throughl the central opening in the aforesaid hopper-i shaped bottoms, where the tank fits against; and is secured to the flanges. 14 and 15 of a2 "chambered fitting 16. IT his fitting-is a casting formed with an outerchamber 17 closedi at its lower end and having a flanged opens; ing 18 in one side, and an inner concentric chamber 19, having an opening 20 diametrically opposite-the opening 18, with an inter-; nally shouldered nipple 21' extending from it across the outer chamber and the stufling box, w,hich extends within the inner chamber, coperates at its expanded section, with valved discharge-pipe 22 for the pulp,

which gains access to the pipe at the tankimperforate bottom 8 all its contained washing-water. 'A valved branch-pipe 26 extends upwardly to the top of the tank from the pipe 23, and is open at its upper end to atmospheric pressure; and below its upper end it has con led with it a depending discharge-spout 2 to discharge, as to a sewer, "the used washingwater as it leaves'the tank during the operation of the machine. An-impeller 28 is mounted on the end of the shaft 10 in the tan'kand iscomposed, preferably, of two similar arms extending diametrically across the tank, as shown. It is formed, with the parts integral, as by casting, of a frame comprising a shield-forming base-plate 29' extending from a central sleeve 30, where its sections are shown (Fig. 2) to be slightly ofi'set, one with relation to the other, thesleeve' fitting about and being keyed to the end of theshaft 10, the opposite plate-sections conforming in inclination to ,the ang'le of the bottom '7 and extending into close proximity thereto, a top-plate 31 having outer horizontal sections meeting at a central'V-shaped, or depressed section, and

a plurality of blades 32 extending between the upper and lower plates at intervals forming passages 33 between the blades. These blades, of which any desired number maybe provided, and which preferably incline relatively to the parallel lateral edges of the top and bottom frame-plates, as or substantially as indicated in Fig. 2, decrease 'in area from the center of the impeller outwardly along each arm thereof, for the purv pose hereinafter explained.

In the tank, on the bottom thereof, are

provided guide-vanes 35, spaced apart to form passages between them and extending upwardly. in the direction of rotation of the impeller. Directly above these vanes is another vertical series of vanes 36, spaced apart to form passages between them and extending from the tank-wall just below the height to which the water attains in the tank, these vanes curving inwardly toward the vertical center of the tank and in the direction of rotation of the impeller. I prefer to provide the respective sets of these vanes 35 and 36 at diametrically opposite points in the tank, as shown in Fig. 1, to

. balance the action therein on its contents.

A valved pipe 37 is shown for introducing steam into the tank to heat the water; and While the machine is in operation, by driving the shaft 10 by a shaft'lO carrying a beveled gear 12 meshing with the gear 12,

the tank is constantly replenished with water through a sprinkling pipe 38 supportediwithin it at its upper end.

1 Filter pulp to be washed being introduced into the tank, as also washing water through the pipes 24 and 26 (the valves in the other pipes being closed, except the'pipe 37, which may water 'enterin the tank from the pipe 38, for washing t e pulp in my improved machine, the impeller may b .'Qtated at a comparatively slow rate of speed (say,'about 15 to revolutions per minute)l-;with the adthe washing action of the water.

guiding the mass upwardly, it encounters the vantage of saving power; but where the condition of the material operated onrequires, higher speed maybe had without agglomerating the pulp intoknots or balls by impact.

Therotation of the impeller tends to throw the contents radially in the outward direction from the center of rotation, and causes athorough. mixture of the water and pulp, to take place in passing through the passages 33, thereby enhancing the washing action of" the water; and the areas of the radiallysuccessive blades, which decrease in theoutward direction, as aforesaid, are proportioned'to their relative speedof rotation,

lthereby to aiford'to all the blades the same, or approximately the same capacity in im-' pelling the contents of the tank. In thusimpelling the contents, wherein there is a total avoidance of dead points therein, and

whereby the entire body of the mass is kept in constant circulation, the vanes 35, which are provided as a matter of preference guide the mass upwardly, and its passage b tween these vanes tends to enhance the mixing and In thus vanes 36', also provided as a matter of preference, in passing between which the mixing of the water and pulp and the washing action of the latter are still further enhanced; and the upper vanes guide and direct the 'mass, as indicated by the dotted curved lines be open to admit steam), and with provides at 39 in Fig. centripetally or toward the center of thetank, to be subjected over again, and repeatedly in the same way, to the: action of the intersticial or perforate impeller. Meantime, the. dirty water constantly discharges. through the pipe 23, the opened branch pipe 26 and the outlet-pipe 27, which I by being coupled to the branch-pipe 26 between/the. ends of the latter, maintains the desired 'water-level'in the tank in line with the coupling. r i

The loss of the pulp undergoing washing in my improved machine is very little; and it does notclog the perforations in the bottom 7, which. has smooth surfaces through which the holes extend, and which is to be distinguished .from the wire screen more usually employed for the water-separating purpose in machines of the present class and tends to gather the pulp in its reticulations. Moreover, the wideness of the base-plate 29 of the im eller-frame tends to prevent the toward the bottom ofthe tank. Also, that 160 the action of the impeller-blades not only thoroughly mixes and subdivides the pulp, but the impeller operates smoothly without exerting any churning action, which would tend-to ball and rknot thesame. Furthermore, the machine is very economical in the water used, requiring a tank-capacity of only about 2 gallons of water for each poundof drypulp;and the scrubbing, is so thorough, that the clean water constantly supplied from the pipe 38 acts very quickly on themass. When the washing of a batch of pulp is completed, the water-supply to the pipe 38 is shut 011', and the valve in the pipe 22 is opened to discharge through the 11 5 latter the mass from the tank I realize that considerable variation is posf sible in the details of construction thus specifically shown and. describedand I do not intend by illustrating a single, specific or preferred embodiment of my invention to be limited thereto; my intention being in the following claims. to claim protection upon all. the novelty there'may' be in my invention as broadly. as the state of the art will permit.

.What I claim as new and desire to secure by Letters Patent is:

' 1. In a pulp-washing machine, a tank for holding the pulp and water, provided with 2. In a pulp-Washing machine, a tank for holding the pulp and water, provided with an outlet for the water, and an impeller supported in the tank to extend radially and rotate horizontally therein and provided b with vertical non-radial blades forming passages between them, said blades decreasing successively in area outwardly in the radial direction.

3. In a pulp-washing machine, a tank for holding the pulp and water, having an inner numerously perforated hoppered bottom and an outer imperforate bottom forming an interposed drainage-space with a central outlet for the wash-water, and an impeller comprising vertically-bladed arms extending from a center at which the impeller is rotatably supported in the tank, and having a base-plate extending parallel with and close to the surface of said bottom and forming a shield to prevent the liquid from being impelled through the bottom-perforations by the action of the impeller.

4. In a pulp-washing machine, a tank for holding the pulp and water, having an inner numerously-perforated hoppered bot" tom and an outer imperforate bottom forming an interposed drainage-space with a central outlet for the wash-water, and an impeller comprising a frame forming arms extending from a center at which the impeller isrotatably supported in the tank,

said frame ,having a base-plate extending parallel with and close to the surface of said "perforated bottom and an upper plate, and lades connecting said plates and forming passages between them. Y a

5. In a pulp-washing machine, a tank for holding the pulp and water, having an inner numerously perforated hoppered bottom and an outer. imperforate bottom forming an interposed drainage-space with a central outlet for the wash-water, and an impeller comprising a frame forming arms extending from a center at which the impeller is rotatably supported centrally, inthe tank, said frame having a base-plate extending parallel with and close to the surface of said hoppered bottom and an upper plate depressed between its ends toward said center, and blades connecting said plates, inclining relatively to the plate-edges and forming passages between them. 1

6. In a pulp-washing machine, a tank for holding the pulp and water,'having an inner numerouslyperforated. hoppered bottom and an outer imperforate bottom forming an interposed -drainage-space, a chambered fitting in the apex of said hoppered bottom having an outer chamber open to said space and provided with an outlet having a discharge-pipe extending from it and provided with an upwardly-extending valved branch having a discharge-spout depending from between its ends, said fitting also having an posed drainage-space with a central outlet for the wash-water, a drive-shaft journaled to extend upwardly through said outlet into thetank, an impeller comprising a vertically-bladed frame journaled between its ends on said shaft to sweep over the surface of said inner bottom, and means for driving said shaft at a slow rate of speed.

8. In a pulp-washing machine, a tank for holding the pulp and water, having an impeller rotatably supported in the tank and comprising a frame forming arms provided with spaced non radial passage forming blades and spaced guide-vanes projecting inwardly from the wall of the tank.

9. In a pulp-washing machine, a tank for holding the pulp and water, an impeller rotatably supported in the tank and comprising a frame forming arms provided with spaced non-radial passage-forming blades and spaced guide-vanes on the bottom of the tank adjacent to the path of the impeller-arms.

10. In a pulp-washing machine, a tank for holding the pulp and water, an impeller rotatably supported in the tank and comprising a frame forming arms provided vwith spaced non radial passage forming blades, spaced guide-vanes projecting from the tank-bottom, and spaced guide-vanes projecting inwardly from the wall of the tank over said bottom vanes.

' 1 11. In a pulp-washing machine, a tank for holding the pulp and water, an impeller ro-' tatably supported in the tank and comprising a frame forming arms having a central depression at the axis of rotation-and pro-' having 'a base-plate exfending parallel with e and close to :thesuriace of sand perforated. from the tank-bottom, and spaced guide- 10' bottmn," and an upper plate.- containing a central depression, and bladesconnecting said plates, inclining relatively te the plate edges and formingpassages between them,

said blades decreasmg in surface-area 'suecessmel-y ztowar dv theouter-ends of, ithe arms,

spaced guide-vanes projecting upwardly vanes projecting inwardly from the wall of the tank over said bottom-vanes; JOSEPH 'SCHNEIBLE. In presence of- L. HEISLAR, A. J. FLOYD. 

